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VH+ 101220

 
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immpy



Joined: 06 May 2017
Posts: 325

PostPosted: Mon Oct 12, 2020 6:27 pm    Post subject: VH+ 101220 Reply with quote

Hello all, enjoy the puzzle...

Code:

+-------+-------+-------+
| . . . | 7 . . | . . . |
| 3 . 6 | 8 9 . | . 4 . |
| 4 . 7 | . . 2 | . . . |
+-------+-------+-------+
| . 9 . | . . . | 4 . . |
| 7 . 3 | . . . | . 1 . |
| . . . | . . . | . 5 7 |
+-------+-------+-------+
| 1 7 5 | . 8 . | 6 3 . |
| . . 9 | . . 6 | . . . |
| 6 . 4 | . 1 . | 5 7 . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

cheers...immp
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dongrave



Joined: 06 Mar 2014
Posts: 373

PostPosted: Tue Oct 13, 2020 7:11 pm    Post subject: Reply with quote

Here's the grid after basics:

Code:

+-------------+------------------+-----------------+
| 9  1258 28  | 7     3456 1345  | 238  268 123568 |
| 3  125  6   | 8     9    15    | 7    4   125    |
| 4  158  7   | 136   356  2     | 38   9   13568  |
+-------------+------------------+-----------------+
| 5  9    128 | 136   236  7     | 4    268 2368   |
| 7  46   3   | 469   2456 4589  | 289  1   268    |
| 28 46   128 | 13469 2346 13489 | 2389 5   7      |
+-------------+------------------+-----------------+
| 1  7    5   | 249   8    49    | 6    3   29     |
| 28 3    9   | 5     7    6     | 1    28  4      |
| 6  28   4   | 239   1    39    | 5    7   289    |
+-------------+------------------+-----------------+

I tried to represent the contradiction that I arrived at below but I'm not sure if the Eureka notation is right so I'm hoping that Clement will let me know if it's wrong!

8r8c8 - [(8)r4c8 -(8=2*|9)r79c9 -(8)r8c1] = r9c2 - r13c2 = r1c3 - r4c3 = 8*r4c9 - (2*8=6)r5c9 - (6=4)r5c2 - (46=9)r5c4 - (8*9=2)r5c7 - (28*=6)r4c8; contradiction (i.e. 6r4c8, 6r5c9) => r8c8 <> 8; stte.
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storm_norm22



Joined: 24 Oct 2020
Posts: 5

PostPosted: Mon Oct 26, 2020 12:20 am    Post subject: Reply with quote

dongrave wrote:
Here's the grid after basics:

Code:

+-------------+------------------+-----------------+
| 9  1258 28  | 7     3456 1345  | 238  268 123568 |
| 3  125  6   | 8     9    15    | 7    4   125    |
| 4  158  7   | 136   356  2     | 38   9   13568  |
+-------------+------------------+-----------------+
| 5  9    128 | 136   236  7     | 4    268 2368   |
| 7  46   3   | 469   2456 4589  | 289  1   268    |
| 28 46   128 | 13469 2346 13489 | 2389 5   7      |
+-------------+------------------+-----------------+
| 1  7    5   | 249   8    49    | 6    3   29     |
| 28 3    9   | 5     7    6     | 1    28  4      |
| 6  28   4   | 239   1    39    | 5    7   289    |
+-------------+------------------+-----------------+

I tried to represent the contradiction that I arrived at below but I'm not sure if the Eureka notation is right so I'm hoping that Clement will let me know if it's wrong!

8r8c8 - [(8)r4c8 -(8=2*|9)r79c9 -(8)r8c1] = r9c2 - r13c2 = r1c3 - r4c3 = 8*r4c9 - (2*8=6)r5c9 - (6=4)r5c2 - (46=9)r5c4 - (8*9=2)r5c7 - (28*=6)r4c8; contradiction (i.e. 6r4c8, 6r5c9) => r8c8 <> 8; stte.


I am not clement. but your logic looks good when I plugged it into xsudo.
it also shows a couple more eliminations as well.

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dongrave



Joined: 06 Mar 2014
Posts: 373

PostPosted: Mon Oct 26, 2020 4:10 pm    Post subject: Reply with quote

Thanks for checking that storm_norm! Hey, I see that you just joined! Welcome!
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storm_norm22



Joined: 24 Oct 2020
Posts: 5

PostPosted: Mon Oct 26, 2020 4:15 pm    Post subject: Reply with quote

dongrave wrote:
Thanks for checking that storm_norm! Hey, I see that you just joined! Welcome!


thank you.

actually my second sign up. was gone for so long that my other account was deactivated.
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